Elastic-band traction technique for cannulating intradiverticular papilla during endoscopic retrograde cholangiopancreatography - Ponz de Leon Pisani, Ruggero; Dell’Anna, Giuseppe; Mandarino, Francesco Vito; Napolitano, Maria; Lerna, Vito; Cangelli, Giuseppe; Testoni, Pier Alberto (Endoscopy, 2021)